I am working on cleaning up some data to use and wanted to replace all the commas with tabs and save it as a .tsv file but for some reason the code didn't pick up on all the commas to replace with tabs and I cant find a pattern as to why is missed a few....anyone had this problem?

For example:
# 2051 Marshfield Hills in the .tsv file has no tab or comma but in the original .csv file there was a comma there...why wasn't it replaced by a tab?

.csv file
2035,42.062204,-71.235774,FOXBORO,25
2038,42.08868,-71.404814,FRANKLIN,25
2040,41.970474,-70.701357,GREENBUSH,25
2041,42.069642,-70.649075,GREEN HARBOR,25
2043,42.212105,-70.884989,HINGHAM,25
2044,41.970474,-70.701357,HINGHAM,25
2045,42.284413,-70.873659,HULL,25
2047,42.142836,-70.69353,HUMAROCK,25
2048,42.013182,-71.218373,MANSFIELD,25
2050,42.111805,-70.710744,MARSHFIELD,25
2051,42.151202,-70.734146,MARSHFIELD HILLS,25
2052,42.181265,-71.309934,MEDFIELD,25
2053,42.156282,-71.427663,MEDWAY,25
2054,42.165249,-71.36126,MILLIS,25

.tsv file
2040    41.970474    -70.701357    GREENBUSH    25
2041    42.069642    -70.649075    GREEN HARBOR    25
2043    42.212105    -70.884989    HINGHAM    25
2044    41.970474    -70.701357    HINGHAM    25
2045    42.284413    -70.873659    HULL    25
2047    42.142836    -70.69353    HUMAROCK    25
2048    42.013182    -71.218373    MANSFIELD    25
2050    42.111805    -70.710744    MARSHFIELD    25
2051    42.151202    -70.734146    MARSHFIELD HILLS      25
2052    42.181265    -71.309934    MEDFIELD    25
2053    42.156282    -71.427663    MEDWAY    25
2054    42.165249    -71.36126    MILLIS    25
2055    41.970474    -70.701357    MINOT    25

1. //Clean zipnov99.csv and save as cleanZips.tsv
2. //load each line into an array of strings
3. String[] zipLines;
4. void setup() {
5.   zipLines = loadStrings("zipnov99.csv");
6.   PrintWriter tsv = createWriter("zips.tsv");
7.   makeTabs(zipLines);
8.   for(int i=0; i < zipLines.length; i++) {
9.     println(zipLines[i]);
10.     tsv.println(zipLines[i]);
11.   }
12. }
13. //change commas (",") to tabs (\t) and save as .tsv
14. void makeTabs(String[] dataArray) {
15.   for(int i=0; i < dataArray.length; i++) {
16.     dataArray[i] = dataArray[i].replaceAll(",","\t");
17.   }
18. }

Thank you!